e2freefrag is used to report free space fragmentation on ext2/3/4
file systems. filesys is the filesystem device name (e.g.
/dev/hdc1, /dev/md0). The e2freefrag program will scan the block
bitmap information to check how many free blocks are present as
contiguous and aligned free space. The percentage of contiguous free
blocks of size and of alignment chunk_kb is reported. It also
displays the minimum/maximum/average free chunk size in the
filesystem, along with a histogram of all free chunks. This
information can be used to gauge the level of free space
fragmentation in the filesystem.
If a chunk size is specified, then e2freefrag will print how
many free chunks of size chunk_kb are available in units of
kilobytes (Kb). The chunk size must be a power of two and be
larger than filesystem block size.
-h Print the usage of the program.
This page is part of the e2fsprogs (utilities for ext2/3/4
filesystems) project. Information about the project can be found at
⟨http://e2fsprogs.sourceforge.net/⟩. It is not known how to report
bugs for this man page; if you know, please send a mail to
email@example.com. This page was obtained from the project's
upstream Git repository
⟨git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git⟩ on 2017-03-13.
If you discover any rendering problems in this HTML version of the
page, or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the information
in this COLOPHON (which is not part of the original manual page),
send a mail to firstname.lastname@example.org
E2fsprogs version 1.43.5-WIP February 2017 E2FREEFRAG(8)